fix(ui-markdown-editor): Fixes functionalities of the toolbar in mark…

[AbhijithGanesh]

…down editor - # 364

Signed-off-by: Abhijith Ganesh g.abhijith14122003@gmail.com

Closes #364

Changes

• Resolution of useMemo bugs, moved to useState and useCallback
• Addition of documented lines of code about Action

Flags

• Changes to Hooks

Screenshots or Video

Author Checklist

• [x] Ensure you provide a DCO sign-off for your commits using the --signoff option of git commit.
• [x] Vital features and changes captured in unit and/or integration tests
• [x] Commits messages follow AP format
• [x] Extend the documentation, if necessary
• [x] Merging to master from fork:branchname
• [ ] Manual accessibility test performed
  • [ ] Keyboard-only access, including forms
  • [ ] Contrast at least WCAG Level A
  • [ ] Appropriate labels, alt text, and instructions